<!--
* @description  
* @fileName  4_列表排序
* @author zhoujunlin
* @date 2022-03-06 16:44:02
* @version V1.0.0
!-->
<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>4_列表排序</title>
    <script src="../js/vue.js"></script>
</head>

<body>
    <div id="app">
        <h2>人员列表</h2>
        <input type="text" placeholder="请输入名字" v-model="keyword">
        <button @click="sortType=2">年龄升序</button>
        <button @click="sortType=1">年龄降序</button>
        <button @click="sortType=0">原顺序</button>
        <ul>
            <li v-for="(p,index) of filterPersons" :key="p.id">
                {{p.name}}-{{p.age}}-{{p.sex}}
                <input type="text">
            </li>
        </ul>
    </div>

    <script>
        Vue.config.productionTip = false
        // 计算属性实现
        var vm = new Vue({
            el: '#app',
            data() {
                return {
                    keyword: '',
                    sortType: 0, // 0原顺序 1 降序 2升序
                    persons: [
                        { id: '001', name: '马冬梅', age: 30, sex: '女' },
                        { id: '002', name: '周冬雨', age: 31, sex: '女' },
                        { id: '003', name: '周杰伦', age: 23, sex: '男' },
                        { id: '004', name: '温兆伦', age: 22, sex: '男' }
                    ]
                }
            },
            computed: {
                filterPersons() {
                    const resultArr = this.persons.filter((p) => {
                        return p.name.indexOf(this.keyword) != -1
                    })
                    if (this.sortType) {
                        resultArr.sort((p1, p2) => {
                            return this.sortType === 1 ? p2.age - p1.age : p1.age - p2.age
                        })
                    }
                    return resultArr
                }
            }
        });

    </script>
</body>

</html>